<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Leaflet JS Bin</title>
  <style>
    #map {
      width:600px;
      height:400px;
    }
  </style>
</head>
<body>
  <div id='map'></div>



  <script>
    // Remember to include either the Leaflet 0.7.3 or the Leaflet 1.0.0-beta1 library

    var myCenter = new L.LatLng(50.5, 30.51);
    var map = new L.Map('map', {center: myCenter, zoom: 15});

    var positron = L.tileLayer('http://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png', {
        attribution: '&copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors, &copy; <a href="http://cartodb.com/attributions">CartoDB</a>'
    }).addTo(map);

    var marker = new L.Marker(myCenter);
    map.addLayer(marker);

    marker.bindPopup("<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec odio. Quisque volutpat mattis eros. Nullam malesuada erat ut turpis. Suspendisse urna nibh, viverra non, semper suscipit, posuere a, pede.</p><p>Donec nec justo eget felis facilisis fermentum. Aliquam porttitor mauris sit amet orci. Aenean dignissim pellentesque felis.</p>");

  </script>
</body>
</html>